PL416273A1 - Method for producing wear and corrosion resistant, multicomponent top coating on the aluminium and silicon casting alloys - Google Patents

Abstract

The subject of the application is a method of producing a multi-component surface layer on silicon aluminum alloys, especially foundry, abrasion and corrosion resistant, consisting in applying a manganese coating on the alloy surface is characterized by phosphorus ions being implanted into the manganese coating by means of a dose range 1 x 1015 - 5 x 1017 P + / cm2 using energy of 10 - 200 keV at room temperature to obtain a manganese phosphor layer. In the application variant, the aluminum alloy with the obtained manganese-phosphor layer is subjected to the process of glow nitriding in a glow nitriding furnace at a temperature of 350 - 560 ° C in an atmosphere of 30 - 60% vol. nitrogen and 30-60% vol. hydrogen, at a pressure of 1.5 - 5.0 hPa, with an air flow of 30 - 60 dm3 / h, for a period of 3 - 6 hours. The resulting aluminum alloy with a manganese-phosphorus-nitrogen layer is preferably cooled in a vacuum at a temperature of 90 - 110 ° C. In another application variant, the aluminum alloy with the obtained manganese-phosphor layer is subjected to the process of glow-oxygen nitriding in a glow-oxygen nitriding device at a temperature of 350 - 600 ° C in an atmosphere of 40 - 60% vol. nitrogen, 40 - 60% vol. hydrogen and with the addition of 10-20% vol. air, at a pressure of 2.0 - 5.0 hPa, with an air flow of 30 - 60 dm3 / h, for a period of 3 - 6 hours to obtain a manganese-phosphorus-nitrogen-oxygen layer.